GB1288688A - - Google Patents
Info
- Publication number
- GB1288688A GB1288688A GB1288688DA GB1288688A GB 1288688 A GB1288688 A GB 1288688A GB 1288688D A GB1288688D A GB 1288688DA GB 1288688 A GB1288688 A GB 1288688A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyisocyanate
- allophanate
- reacting
- dissolved
- monomeric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
- C08G18/4837—Polyethers containing oxyethylene units and other oxyalkylene units
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7837—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing allophanate groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8006—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
- C08G18/8009—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8054—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/38
- C08G18/8058—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/38 with compounds of C08G18/3819
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0008—Foam properties flexible
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0016—Foam properties semi-rigid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0041—Foam properties having specified density
- C08G2110/005—< 50kg/m3
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0041—Foam properties having specified density
- C08G2110/0058—≥50 and <150kg/m3
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
Abstract
1288688 Polyurethane foams FARBENFABRIKEN BAYER AG 17 Dec 1970 [17 Jan 1970] 59899/70 Headings C3C and C3R Polyurethane foams are prepared by reacting, in the presence of a blowing agent, a polyether polyol which has a M.W. of 750 to 10,000 and in which at least 10% of the hydroxyl groups are primary with an allophanate polyisocyanate which contains at least two NCO groups and at least one N,N<SP>1</SP>-disubstituted allophanate group and which is dissolved at a concentration of 10 to 70% by weight in one or more liquid polyisocyanates which do not contain allophanate groups. The polyether is suitably prepared by reacting a polyol or polyamine with an alkylene oxide and may be used in admixture with at least one other compound containing reactive hydrogen atoms. The allophanate polyisocyanates are suitably prepared by reacting N-substituted carbamic acid esters which may contain isocyanate groups with mono- and/or polyfunctional isocyanates. Suitably this is achieved by reacting in one stage a hydroxyl containing compound with excess polyisocyanate and heating the first formed reaction product at 100 to 160‹ C. to form the allophanate polyisocyanate which is dissolved in monomeric polyisocyanate if sufficient polyisocyanate has been added. Alternatively the allophanate polyisocyanate may be formed first and then dissolved in a monomeric polyisocyanate in a separate stage. In a typical example, a linear propylene glycol/ propylene oxide/ethylene oxide polyether, 1,4- butylene glycol, water and triethylene diamine are reacted with an isocyanate solution prepared by reacting 2,2-dimethylpropane-1,3-diol with a large excess of toluene-2,4- and -2,6-diisocyanates to first form the bis-carbamic acid ester diisocyanate dissolved in the monomeric diisocyanate which reaction mixture is then heated to 150‹C. to form a solution of allophanatepolyisocyanate in the monomeric diisocyanate. Uses:-Cushioning material, mattresses, packaging, foils for laminates, insulating material, and in construction of motor cars and aircraft.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002064A DE2002064C2 (en) | 1970-01-17 | 1970-01-17 | Process for the production of flame-retardant elastic or semi-elastic foams |
US10628371A | 1971-01-13 | 1971-01-13 | |
US00260342A US3832311A (en) | 1970-01-17 | 1972-06-06 | Flame-resistant polyurethane foams |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1288688A true GB1288688A (en) | 1972-09-13 |
Family
ID=27182355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1288688D Expired GB1288688A (en) | 1970-01-17 | 1970-12-17 |
Country Status (10)
Country | Link |
---|---|
US (1) | US3832311A (en) |
AT (1) | AT302665B (en) |
BE (1) | BE761626A (en) |
CA (1) | CA944094A (en) |
CH (1) | CH542896A (en) |
DE (1) | DE2002064C2 (en) |
FR (1) | FR2077199B1 (en) |
GB (1) | GB1288688A (en) |
NL (1) | NL168530C (en) |
SE (1) | SE377468B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6773756B2 (en) | 2002-03-20 | 2004-08-10 | Bayer Polymers Llc | Process to manufacture three dimensionally shaped substrate for sound abatement |
Families Citing this family (68)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879316A (en) * | 1968-03-13 | 1975-04-22 | John Fishbein | Polyurethane foams |
US4043950A (en) * | 1973-08-27 | 1977-08-23 | Wilmsen Hans | Process for the manufacture of plastic foams and flame-proofing foams characterized by the use of a carrier foam |
US4071484A (en) * | 1973-10-23 | 1978-01-31 | Kohkoku Chemical Industry Co., Ltd. | Process for preparing flexible flame retarding polyurethane foams |
DE2513741C3 (en) * | 1974-03-30 | 1980-05-14 | Bridgestone Tire Co. Ltd., Tokio | Process for the production of a flame-retardant, smoke-resistant flexible polyurethane foam |
JPS539637B2 (en) * | 1974-08-06 | 1978-04-07 | ||
US4048102A (en) * | 1975-04-21 | 1977-09-13 | The Dow Chemical Company | Process for preparing flexible polyurethane foams |
DE2558523A1 (en) * | 1975-12-24 | 1977-07-07 | Bayer Ag | PROCESS FOR MANUFACTURING NEW POLYSILOXANE-POLYOXYALKYLENE COPOLYMER |
US4190711A (en) * | 1977-09-29 | 1980-02-26 | Union Carbide Corporation | Thermoplastic polyether polyurethane elastomers |
US4906674A (en) * | 1987-10-16 | 1990-03-06 | Ici Americas Inc/Imperial Chemical Industries Plc | Polysocyanate compositions |
DE3825147A1 (en) * | 1988-07-23 | 1990-03-08 | Bayer Ag | METHOD FOR PRODUCING POLYURETHANE FOAMS |
GB8908495D0 (en) * | 1989-04-14 | 1989-06-01 | Ici Plc | Polyisocyanate compositions |
DE4127514A1 (en) * | 1991-08-20 | 1993-02-25 | Bayer Ag | METHOD FOR PRODUCING POLYISOCYANATES FROM DISTILLATION RESIDUES OF THE TOLUYLENE DIISOCYANATE PRODUCTION |
FR2698868B1 (en) * | 1992-12-04 | 1995-02-24 | Rhone Poulenc Chimie | Polyisocyanate blend for the preparation of flexible, high elasticity polyurethane foams. |
DE19534162A1 (en) * | 1995-09-15 | 1997-03-20 | Bayer Ag | Binder combination for the production of solvent-free coating compositions |
US6005062A (en) | 1998-07-02 | 1999-12-21 | 3M Innovative Properties Company | Secondary aspartic acid amide esters |
US6096823A (en) * | 1998-10-14 | 2000-08-01 | Bayer Corporation | Moisture-curable compounds containing isocyanate and alkoxysilane groups |
US7105628B2 (en) | 2002-08-27 | 2006-09-12 | Acushnet Company | Compositions for golf equipment |
US7098274B2 (en) | 2002-08-27 | 2006-08-29 | Acushnet Company | Compositions for golf equipment |
US7138477B2 (en) * | 2002-08-27 | 2006-11-21 | Acushnet Company | Compositions for golf equipment |
US7138475B2 (en) | 2002-08-27 | 2006-11-21 | Acushnet Company | Compositions for golf equipment |
US7115703B2 (en) | 2002-08-27 | 2006-10-03 | Acushnet Company | Compositions for golf equipment |
US7138476B2 (en) | 2002-08-27 | 2006-11-21 | Acushnet Company | Compositions for golf equipment |
US7105623B2 (en) | 2002-08-27 | 2006-09-12 | Acushnet Company | Compositions for golf equipment |
US7157545B2 (en) * | 2002-08-27 | 2007-01-02 | Acushnet Company | Compositions for golf equipment |
US7378483B2 (en) * | 2002-08-27 | 2008-05-27 | Acushnet Company | Compositions for golf equipment |
US7101951B2 (en) | 2002-08-27 | 2006-09-05 | Acushnet Company | Compositions for golf equipment |
DE10334274B3 (en) * | 2003-07-25 | 2005-03-03 | Carcoustics Tech Center Gmbh | Sound-insulating composite part and method for its production |
EP1753798B1 (en) | 2004-05-24 | 2021-01-27 | Hontek Corporation | Abrasion resistant coatings |
US7265195B2 (en) | 2004-06-02 | 2007-09-04 | Acushnet Company | Compositions for golf equipment |
US7276570B2 (en) | 2004-06-02 | 2007-10-02 | Acushnet Company | Compositions for golf equipment |
US7253242B2 (en) | 2004-06-02 | 2007-08-07 | Acushnet Company | Compositions for golf equipment |
US7256249B2 (en) | 2004-06-02 | 2007-08-14 | Acushnet Company | Compositions for golf equipment |
US7253245B2 (en) | 2004-06-02 | 2007-08-07 | Acushnet Company | Compositions for golf equipment |
US20060073321A1 (en) * | 2004-10-01 | 2006-04-06 | Kaushiva Bryan D | Molded flexible polyurethane foams with reduced flammability and superior durability |
US20080159870A1 (en) * | 2006-12-14 | 2008-07-03 | Hontek Corporation | Method and coating for protecting and repairing an airfoil surface using molded boots, sheet or tape |
EP3305465B1 (en) | 2005-12-14 | 2021-11-24 | Hontek Corporation | Method and coating for protecting and repairing an airfoil surface |
EP2762508B1 (en) | 2007-07-23 | 2018-09-19 | Dow Global Technologies LLC | Two part polyurethane curable composition having substantially consistent G-modulus across the range of use temperatures |
DE102007046187A1 (en) | 2007-09-26 | 2009-04-09 | Bayer Materialscience Ag | roof module |
US20110054056A1 (en) | 2008-05-22 | 2011-03-03 | Hefner Jr Robert E | Thermoset polyurethanes |
DE102008051882A1 (en) | 2008-10-16 | 2010-04-29 | Bayer Materialscience Ag | Process for the preparation of polyetherester polyols |
US20110135832A1 (en) | 2009-12-04 | 2011-06-09 | Basf Coatings Ag | Method and composition for refinish coatings |
ES2545993T3 (en) | 2010-10-20 | 2015-09-17 | Basf Coatings Gmbh | Transparent scratch-resistant touch-up coating |
KR20140007822A (en) | 2010-12-20 | 2014-01-20 | 바이엘 인텔렉쳐 프로퍼티 게엠베하 | Method for producing polyether ester polyols |
US20120163981A1 (en) | 2010-12-22 | 2012-06-28 | Hong Shek C | Method and coating for protecting and repairing an airfoil surface |
EP2671853B1 (en) | 2012-06-06 | 2014-12-24 | 3M Innovative Properties Company | Magnetic floor surface |
DE102012209598A1 (en) | 2012-06-06 | 2013-12-12 | Cht R. Beitlich Gmbh | Textile auxiliaries and thus refined textile product |
DE202012013176U1 (en) | 2012-06-06 | 2015-04-01 | !Obac Limited | Magnetic floor surface |
DE102012222045A1 (en) | 2012-12-03 | 2014-06-05 | Cht R. Beitlich Gmbh | Coating of luminophores |
CN104725587B (en) * | 2013-12-18 | 2018-01-30 | 上海东大聚氨酯有限公司 | A kind of polyurethane insulation coating renovation agent and its application and application method |
US20160312091A1 (en) | 2013-12-23 | 2016-10-27 | Dow Global Technologies Llc | Adhesive Containing High Solid Copolymer Polyol Polyurethane Prepolymer |
DE202014101620U1 (en) | 2014-04-07 | 2014-04-29 | Franken Systems Gmbh | Container with 2-component polyurea synthetic resins |
DE102015108232A1 (en) | 2015-05-26 | 2016-12-01 | Franken Systems Gmbh | Process for the moisture-resistant primer of mineral substrates |
DE102015110841A1 (en) | 2015-07-06 | 2017-01-12 | Franken Systems Gmbh | Use of a reactive system for building waterproofing and structural waterproofing |
WO2018046335A1 (en) | 2016-09-08 | 2018-03-15 | Basf Coatings Gmbh | Radiation-curable hyperbranched polymers with dicarboxylic acid cores |
WO2018046334A1 (en) | 2016-09-08 | 2018-03-15 | Basf Coatings Gmbh | Coatings with radiation-curable hyperbranched polymers |
US10689541B2 (en) | 2016-09-15 | 2020-06-23 | Basf Coatings Gmbh | Coatings with wax-modified hyperbranched and flexible hyperbranched polyols |
US20190106592A1 (en) | 2017-10-11 | 2019-04-11 | Basf Coatings Gmbh | Hyperbranched polymers for organic pigment dispersions and water-sensitive pigments |
CN112105664B (en) | 2018-04-30 | 2022-10-28 | 赢创运营有限公司 | Polyurea compositions derived from polyaspartic esters and secondary heterocyclic amine-derived aspartic esters |
EP3741788A1 (en) | 2019-05-24 | 2020-11-25 | Covestro Deutschland AG | Method for the preparation of polyoxyalkylenpolyol mixtures |
EP3838963A1 (en) | 2019-12-17 | 2021-06-23 | Covestro Deutschland AG | Method for producing polyoxyalkylene polyesterpolyols |
CN114929817B (en) | 2019-12-30 | 2024-01-05 | 巴斯夫涂料有限公司 | Coating containing branched polyester polyol as plasticizer |
US20230332011A1 (en) | 2020-08-28 | 2023-10-19 | Basf Coatings Gmbh | Solvent-Borne, Two-Pack, Anticorrosion Coating Composition |
WO2022060685A1 (en) | 2020-09-15 | 2022-03-24 | Dow Global Technologies Llc | Low odor polyurethane adhesives |
US20220089901A1 (en) * | 2020-09-24 | 2022-03-24 | Covestro Llc | Clear coating compositions having low solvent content |
WO2022090358A1 (en) | 2020-10-28 | 2022-05-05 | Basf Se | Production of a polyester polyol with low voc emission |
WO2022096390A1 (en) | 2020-11-06 | 2022-05-12 | Covestro Deutschland Ag | Method for producing a polyol mixture |
CN117795023A (en) | 2021-08-17 | 2024-03-29 | 赢创运营有限公司 | Polyurea compositions derived from polyaspartates and 2-substituted succinates |
WO2023057328A1 (en) | 2021-10-07 | 2023-04-13 | Covestro Deutschland Ag | Process for preparing polyoxyalkylene polyester polyols |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB994890A (en) * | 1961-12-18 | 1965-06-10 | Ici Ltd | New organic polyisocyanates and their manufacture |
GB1124789A (en) * | 1964-12-31 | 1968-08-21 | Ici Ltd | Improvements in or relating to polyurethanes |
AT304874B (en) * | 1969-06-20 | 1973-01-25 | Bayer Ag | Process for the production of flame-retardant, optionally cellular plastics containing urethane groups |
-
1970
- 1970-01-17 DE DE2002064A patent/DE2002064C2/en not_active Expired
- 1970-12-14 CH CH1852670A patent/CH542896A/en not_active IP Right Cessation
- 1970-12-17 GB GB1288688D patent/GB1288688A/en not_active Expired
-
1971
- 1971-01-12 CA CA102,589A patent/CA944094A/en not_active Expired
- 1971-01-13 AT AT22171A patent/AT302665B/en not_active IP Right Cessation
- 1971-01-14 SE SE7100410A patent/SE377468B/xx unknown
- 1971-01-15 BE BE761626A patent/BE761626A/en not_active IP Right Cessation
- 1971-01-15 NL NLAANVRAGE7100592,A patent/NL168530C/en not_active IP Right Cessation
- 1971-01-15 FR FR7101372A patent/FR2077199B1/fr not_active Expired
-
1972
- 1972-06-06 US US00260342A patent/US3832311A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6773756B2 (en) | 2002-03-20 | 2004-08-10 | Bayer Polymers Llc | Process to manufacture three dimensionally shaped substrate for sound abatement |
US7285316B2 (en) | 2002-03-20 | 2007-10-23 | Bayer Materialscience Llc | Process to manufacture three dimensionally shaped substrate for sound abatement |
Also Published As
Publication number | Publication date |
---|---|
CA944094A (en) | 1974-03-19 |
DE2002064C2 (en) | 1983-09-01 |
FR2077199A1 (en) | 1971-10-22 |
FR2077199B1 (en) | 1977-01-21 |
BE761626A (en) | 1971-06-16 |
DE2002064A1 (en) | 1971-07-22 |
NL168530C (en) | 1982-04-16 |
NL168530B (en) | 1981-11-16 |
US3832311A (en) | 1974-08-27 |
SE377468B (en) | 1975-07-07 |
AT302665B (en) | 1972-10-25 |
NL7100592A (en) | 1971-07-20 |
CH542896A (en) | 1973-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |